<template>
  <div :class="className" :style="{height:height,width:width}" />
</template>

<script>
import echarts from 'echarts'
require('echarts/theme/macarons') // echarts theme
import resize from './mixins/resize'

const animationDuration = 1000

export default {
  mixins: [resize],
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '300px'
    },
    chartdata: {
      type: Object,
      require: true,
      default: null
    }
  },
  data() {
    return {
      chart: null
    }
  },
  watch: {
    chartdata: {
      handler(newItem, oldItem) {
        this.setOptions(newItem)
      }
    }
  },
  mounted() {
    this.$nextTick(() => {
      this.initChart()
    })
  },
  beforeDestroy() {
    if (!this.chart) {
      return
    }
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart() {
      this.chart = echarts.init(this.$el, 'macarons')
      this.setOptions(this.chartdata)
    },
    setOptions(data) {
      const pv = data.pv.map(item => {
        return item[1]
      })

      const cart = data.cart.map(item => {
        return item[1]
      })

      const buy = data.buy.map(item => {
        return item[1]
      })

      const fav = data.fav.map(item => {
        return item[1]
      })
      this.chart.setOption({
        tooltip: {
          trigger: 'axis',
          axisPointer: { // 坐标轴指示器，坐标轴触发有效
            type: 'shadow' // 默认为直线，可选为：'line' | 'shadow'
          }
        },
        grid: {
          top: 50,
          left: '2%',
          right: '2%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [{
          type: 'category',
          data: data.pv.map((item) => {
            return item[0].replace('2017-', '')
          })
        }],
        yAxis: [{
          type: 'value',
          axisTick: {
            show: false
          }
        }],
        legend: {
          data: ['Visits', 'Favorites', 'AddCart', 'Purchases']
        },
        series: [{
          name: 'Visits',
          type: 'bar',
          stack: 'vistors',
          // barWidth: '60%',
          data: pv,
          //   data.pv.map((item) => {
          //   return item[1]
          // }),
          animationDuration
        }, {
          name: 'Favorites',
          type: 'bar',
          stack: 'vistors',
          // barWidth: '60%',
          data: fav,
          //   data.fav.map(item => {
          //   return item[1]
          // }),
          animationDuration
        }, {
          name: 'AddCart',
          type: 'bar',
          stack: 'vistors',
          // barWidth: '60%',
          data: cart,
          //   data.cart.map(item => {
          //   return item[1]
          // }),
          animationDuration
        },
        {
          name: 'Purchases',
          type: 'bar',
          stack: 'vistors',
          // barWidth: '60%',
          data: buy,
          //   data.buy.map(item => {
          //   return item[1]
          // }),
          animationDuration
        }]
      })
    }
  }
}
</script>
